Roof Chimney Flashing Details

It extends at least 8 up the wall and at least 4 onto the roof on all sides of the chimney.

Roof chimney flashing details.

Order about 12 in. One common method is to lay the edge metal under the eaves membrane and over the rake. Mc14a chimney flashing step type. Mc12b metal flashing options.

Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. Masonry chimneys allowing for movement. The minimum depth of the reglet should be 1 in but 1 in.

Details roofing wrb flashing. The front back and side flashing metal. Mc16 skylight underlayment detail. Mc12a pan flashing roof to sidewall 2.

Some lumberyards stock a dormer flashing. Chimney flashing flat roof copper base flashing is attached to the roof deck before installation of the roofing. Prebent step flashing 8 x 8 in. The front and back are custom fabricated to order for an exact fit.

Mc15 chimney cricket flashing pan type. Flashing is installed to surround roof features such as vents chimneys and skylights. Two ways to flash roof edges. More than the width of the chimney.

Bottom before the base. The base of the counterflashing should include a hemmed drip edge to manage the water figure 12. Press the flashing into the urethane to achieve a positive seal. For extra protection run a bead of urethane between the step flashing and the chimney.

Mc15a chimney cricket flashing step type. Kits made from copper lead coated copper freedom gray and tcsii are always soldered while aluminum parts are riveted and can be sealed before installation. Copper cap flashing then covers the upper edge. Chimney flashing kits are normally composed by 3 parts.

In addition to the saddle you ll need the following sheet metal parts see figure a. Roofers call these shingle tins. The flashing should extend away from the chimney past the base or step flashing before taking a sharp bend downward to create a capillary break an air space that will not allow capillary suction of water from below. Mc14 chimney flashing pan type.

Here is a specific side view of the primary flashing head flashing detail with a shingle roof covering the base of the head flashing. Chimneys have a foundation which may be independent from the house. As you roof along a chimney alternate shingles and l shaped pieces of step flashing. On a chimney flashing.

Counterflashing will cover the tops of the step flashing. In any case the roof deck.